Debbie,

I see that your list of replace items is getting pretty exhaustive.  I'm
the listmember who has written a great deal on this subject with regard
to "adjusting" the fuel injection system.

What I'm suggesting is you search the archives under my email, kelphoto,
since say 98  99 to date and read about the method of adjusting the
Vanagon Fuel injection system.

For starters, you may in fact have an intermitten electrical supply
problems somewhere, difficult but not impossible to track.  But it would
be best if you verifyed that the system is properly set.

Firsti is the idle switch, then timing, fuel pressure, and spring
tension on the AFM.  All of these adjustment need to be correct. The
Computer just assumes these values are correct, it has no way of
adjusting them.

As to intermittetent issues, that I recall:  fuel pump relay, hall
sender connector at distributor, O2 sensor cable shorts, cracks in
solder on the ECU board, and or a heat damage power supply, I think .
 Up front the ingition switch and the main power relay also have beeen
intermittent issues.

For better diagnostic suggestions, if you could note what other details
seem to accompany the no start hot or hot stall.

sincerely,

Mark Keller